XOAR PJN 13x4 Electric RC Airplane Propeller. 13 Inch 2 Blade Wood Prop for Electric Motor Premium material: made of premium top grade german pollmeier beechwood. It is excellent for minimal elongation, breakpoint and distortion, therefore it is the best for making wooden rc electric propeller. Cnc digital imaging: cnc digital imaging process ensures consistent quality in diameter, propeller blade profile and pitch which are all crucial for rc electric airplane performance. Light weight: unquiely designed hub and blade profile creates one of the lightest wooden propellers for electric flights. Pre-balanced* : each xoar prop is manually finished to reach perfect surface smoothness. It is balanced both horizontally and vertically for minimal vibration caused by rc airplane propeller. Spec: diameter: 13 in | pitch: 4 | weight: 22g | shaft diameter: 6mm | type: tractor propeller.